Generic bluff bodies with undetermined separation location

L. Taubert, Israel J Wygnanski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The parameters governing forced attachment of flow to a flat, inclined surface, were determined by Nishri1. The addition of convex curvature is investigated presently using the circular cylinder as a model. In both flows the forcing consisted of two-dimensional, periodic oscillations emanating from a narrow slot. Naturally the flow separates from the surface of a smooth circular cylinder around 70° from the leading stagnation point when the Reynolds number is approximately 40,000. Periodic excitation from a slot located some 40° further downstream from the natural separation location altered very significantly the pressure distribution on that surface. On the opposite side of the cylinder neither the location of separation on the opposite side nor the pressure distribution was substantially affected, but a major change in the base pressure was observed. The cylinder started to lift and the typical vortex shedding from the cylinder was altered if not entirely eliminated. Experiments were carried out using both pressure measurements and particle image velocimetry (PIV). Numerical simulations were also carried out using an unstructured mesh finite element method with dynamic and constant coefficient Smagorinsky large eddy simulation (LES) turbulence models.

Original languageEnglish (US)
Title of host publication1st Flow Control Conference
Publication statusPublished - 2002
Event1st Flow Control Conference 2002 - St. Louis, MO, United States
Duration: Jun 24 2002Jun 26 2002

Other

Other1st Flow Control Conference 2002
CountryUnited States
CitySt. Louis, MO
Period6/24/026/26/02

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ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

Cite this

Taubert, L., & Wygnanski, I. J. (2002). Generic bluff bodies with undetermined separation location. In 1st Flow Control Conference